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From "Benjamin Francisoud (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-106) Improve use of StringBuffer in TestBuiltin.java to reduce memory footprint and increase speed
Date Tue, 12 Feb 2008 16:45:07 GMT

    [ https://issues.apache.org/jira/browse/PIG-106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568203#action_12568203
] 

Benjamin Francisoud commented on PIG-106:
-----------------------------------------

Execution time:
before: 687 ms - after: 515 ms
other runs give almost the same numbers...

> Improve use of StringBuffer in TestBuiltin.java to reduce memory footprint and increase
speed
> ---------------------------------------------------------------------------------------------
>
>                 Key: PIG-106
>                 URL: https://issues.apache.org/jira/browse/PIG-106
>             Project: Pig
>          Issue Type: Improvement
>    Affects Versions: 0.1.0
>            Reporter: Benjamin Francisoud
>            Priority: Minor
>         Attachments: PIG-106-v01.patch
>
>
> While investigating PIG-99, in TestBuiltin.java line 315:
> {code:java}
> for (int i = 0; i < LOOP_COUNT; i++) {
>     for (int j = 0; j < LOOP_COUNT; j++) {
>         sb.append(i + "\t" + i + "\t" + j % 2 + "\n");
>     }
> }
> {code}
> doing "i + "\t" + i + "\t" + j % 2 + "\n"" creates temporary String(s) reducing the advantages
of using a StringBuffer.
> Could be replace with:
> {code:java}
> for (int i = 0; i < LOOP_COUNT; i++) {
>     for (int j = 0; j < LOOP_COUNT; j++) {
>         sb.append(i);
>         sb.append("\t");
>         sb.append(i);
>         sb.append("\t");
>         sb.append(j % 2);
>         sb.append("\n");
>     }
> }
> {code}

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